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Magnetoelectric actuation is a burgeoning topic nowadays given the need for energy-efficient devices. Magnetoelectric actuation refers to the control of magnetic properties of materials using voltage. Several mechanisms contribute to the magnetoelectric response including surface charging, ionic migration (referred to as ‘magneto-ionics’), reduction/oxidation reactions, and ferroelectric/ferromagnetic coupling. In magneto-ionics, certain ions (e.g., oxygen, hydrogen, nitrogen, or lithium) migrate within a material when an external voltage is applied. Since electric fields, rather than electric currents, drive ionic motion, this process is more energy efficient. Potential applications of magneto-ionics include magnetic memory devices, neuromorphic computing, and adaptive magnetic materials. Electrodeposited films, micro- and nanostructures are promising candidates for oxygen magneto-ionic investigations, particularly those with high surface-to-volume (S/V) ratios. Ferromagnetic Ni, Co and their alloys can be electrodeposited from aqueous solutions. It has been demonstrated that mesoporous Ni-Cu films with ultranarrow pore walls enable the entire film (and not just the utmost surface) to contribute...